System of electrical distribution.



O. O. KRUH.

SYSTEM OF ELECTRICALDISTRIBUTION. APPLYIOATION FILED SEPT. 1a, 1905.RENEWED MAR. s, 1908.

900,745,; I I Patented 001;. 13, 1908.

/rn/em:or: Os/as Ohru w WM osI Aso'. KRUH, or SGHENECIADY, NEW Your,rssicnoni'ro GENERAL meme GOMPANY, A CORPORATI ON or new YORK.

SYSTEM or 'nmo'rnrcan msrmsu'rron.

Specification of Letters Patent. I

Patented. Oct. 13, 1908.

Application filed September 1.5, 1905, Serial No. 278,553. Renewed March6, 1908. Serial No. 419,670.

tady and State of New York, have invented certain new and usefulImprovements in the following is a specification. I

My present invention relates to systems of electrical distributionembodying vapor electric apparatus such as rectifiers or the like;

It com rises certain improvements whereby a num er of rectifiei's may beoperated in series with each other, and thus divide between them thestress imposed by the impressed alternating electro motive force. Amongother advantages, this enables a hi her voltage alternating current tobe rectihed than might be feasible with a single rectifier.

The feapures of novelty which are e1nbodied in my invention are setforth with particularity in the appended claims. The invention itself,however, will be better understood by reference to the followingdescription taken in connection with the accompanying drawings showingdiagrammatically one arrangement of 'my invention.

In the drawings the source of alternating current to be rectifiedisindicated conventionally by the supply mains 1, 2. A transformer,either'of the constant potential or constant current type, havin aprimary winding 3 and a secondary win ing 4 may be used to producedesired changes in the voltags of the source. The leads 5 and 6 ex-Systems of Electrical Distribution, of which.

tending from the secondary winding convey current to the rectifyingsystem which I will now describe. p p

I have represented in the drawin s two rectifiers at 7 and 8'. Theindividua rectifiers may he of a construction now well understood in theart and therefore require few Words of explanation. The rectifier 7 forexample consists of an exhausted tube in which are located, in separatearms of the tube, two gra hite anodes 9 and 10, while in the bottom of t1e tube there is arranged a body of mercury 11 constituting a cathode.In the same way the rectifier 8 is provided with anodes 12" is indicatedat 15, and in the case of other rectifier at 16.

' The rectifiers are provided as usual-with corn ensating reactances.The reactances for t e rectifier 7 are indicated at 17 and 18,

and inthe case of the rectifier 8 they are 9, 10, 1'2 and 13 are linkedtogether across the same meme 5 and 61 The cathode 'of each rectifier isconnected to the junction be tween the coils of its compensatingreactance. Thus the cathode 11 is connected between the coils 17 and 18,while the cathode 14 is connected between the coils 19 and O. Y

. The load circuit is connected at one end to the junction between thetwo sets of compensating reactances, as at the point 21, while the otherend of the circuit is connected to a point 22 joining together theadjacent anodes 10 and 12 of the two rectifiers.

icated' res ectively by the single and double arrows. us the current forone polarity follows down from the lead 5, through the rectifier 7 tothe reactance 18, through the load indicated at 23, then through the'recti-' fier 8 to the reactance 20, and back to the other lead 6. Theother polarity wave takes a similar path but in the reverse directionthrough the system as indicated by the double headed arrows. Both wavestraverse the load circuit in the same direction.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is,- 1. The combination of alternating current leads, alurality of energy-storing devices connecte inseries across said leads,a lurality of rectifiers, a work circuit exteni ing from saidenergy-storing devices and connected to said rectifiers, and connectionsbetween the reotifiers and the energy-storing devices for passingrectified current through 'sald rectifiers and work circult 1n series.

2. The combination of alternating current supplymalns, reactancesconnected in series across said mains, rectifiers having their positlveelectrodes llnked together &GI'OSS-SL1(l mains and thelronegatlveelectrodes com I nected respectively to junction points between pairs ofsaid. reactances, and a work circuit connected between a oint in saidrejunction between edjscent anodes to seps- 10 ectences and the u net1onetween two of rate points in the circuit oi SfLld energythe enodes ofsaid rectifiers. storing devices.

3. The combination ofeiternating current In witness whereof, I havehereunto set leads, energy-storing devicesin series across my hand this14th day of September, 1905.

said leads, a lurahty of Va or electric'de- OSIAS O. KRUH. vices havingt eir ositive e ectrodes linked Witnesses: together across sei mains,and connections BENJAMIN B. HULL,

both from the negative electrodes and the HELEN ORFORD.

